1 /* 2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZVERIFY_HPP 25 #define SHARE_GC_Z_ZVERIFY_HPP 26 27 #include "memory/allocation.hpp" 28 29 class ZVerify : public AllStatic { 30 private: 31 template <typename RootsIterator> 32 static void roots_impl(); 33 static void roots(bool verify_weaks); 34 35 static void roots_strong(); 36 static void roots_weak(); 37 static void roots_concurrent(); 38 static void roots_concurrent_weak(); 39 40 static void objects(bool verify_weaks); 41 42 static void roots_and_objects(bool visit_weaks); 43 44 public: 45 // Verify strong (non-concurrent) roots. Should always be good. 46 static void before_zoperation(); 47 48 // Verify all strong roots and references after marking. 49 static void after_mark(); 50 51 // Verify strong and weak roots and references. 52 static void after_weak_processing(); 53 }; 54 55 class VM_ZVerifyOperation : public VM_Operation { 56 public: 57 virtual bool needs_inactive_gc_locker() const { 58 // An inactive GC locker is needed in operations where we change the bad 59 // mask or move objects. Changing the bad mask will invalidate all oops, 60 // which makes it conceptually the same thing as moving all objects. 61 return false; 62 } 63 64 virtual void doit() { 65 ZVerify::after_weak_processing(); 66 } 67 68 bool success() const { 69 return true; 70 } 71 72 virtual VMOp_Type type() const { return VMOp_ZVerify; } 73 }; 74 75 #endif // SHARE_GC_Z_ZVERIFY_HPP